You sould try to get a factory service manual so you can fix your car. Cd-rom versions are available from www.ideal-z.com
. Check out the Courtsey Nissan link on the ideal-z site, order the Ztherapy Understanding FI video too. It will help explain things.
If you want the paper version of the FSM try SCHIFF MANUALS 1-888-789-6882.
V-8's and performance mods are cool, but first try to fix what you have...